@sangaman/xud
Version:
Exchange Union Daemon
76 lines • 3.59 kB
JavaScript
;
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
result["default"] = mod;
return result;
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const bodyParser = __importStar(require("body-parser"));
const path_1 = __importDefault(require("path"));
const grpc_dynamic_gateway_1 = __importDefault(require("@exchangeunion/grpc-dynamic-gateway"));
const express_1 = __importDefault(require("express"));
const swagger_ui_express_1 = __importDefault(require("swagger-ui-express"));
const grpc_1 = __importDefault(require("grpc"));
const swaggerDocument = require('../../proto/xudrpc.swagger.json');
/** A class representing an HTTP web proxy for the gRPC service. */
class GrpcWebProxyServer {
constructor(logger) {
this.logger = logger;
/**
* Start the server and begins listening on the specified proxy port.
*/
this.listen = (proxyPort, grpcPort, grpcHost) => {
// Load the proxy on / URL
const protoPath = path_1.default.join(__dirname, '..', '..', '..', 'proto');
const gateway = grpc_dynamic_gateway_1.default(['xudrpc.proto'], `${grpcHost}:${grpcPort}`, grpc_1.default.credentials.createInsecure(), protoPath);
this.app.use('/api/', gateway);
return new Promise((resolve, reject) => {
/** A handler to handle an error while trying to begin listening. */
const listenErrHandler = (err) => {
reject(err);
};
this.server = this.app.listen(proxyPort, () => {
this.logger.info(`gRPC Web API proxy listening on port ${proxyPort}`);
// remove listen error handler and set a general error handler
this.server.removeListener('error', listenErrHandler);
this.server.on('error', (err) => {
this.logger.error('Web proxy server Error: ' + err.message);
});
resolve();
});
this.server.on('error', listenErrHandler);
});
};
/**
* Stops listening for requests
*/
this.close = () => {
return new Promise((resolve, reject) => {
if (this.server && this.server.listening) {
this.server.close(() => {
this.logger.info('gRPC Web API proxy stopped listening');
resolve();
}).once('error', (err) => {
this.logger.error(err);
reject(err);
});
}
else {
// there is already no server listening
resolve();
}
});
};
this.app = express_1.default();
this.app.use(bodyParser.json());
this.app.use(bodyParser.urlencoded({ extended: false }));
this.app.use('/api-docs', swagger_ui_express_1.default.serve, swagger_ui_express_1.default.setup(swaggerDocument));
}
}
exports.default = GrpcWebProxyServer;
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